Ohmís law

Ohm's law is the main basic electrical law and defines the resistance of a device to the
flow of electrons.

There are three different notations of Ohmís
law

1. Unknown current

2.
Unknown voltage

3. Unknown resistance

(Most people can remember a picture easier than a mathematical formula. By knowing any two values you can figure out the third.
Simply put your finger over the portion of the symbol you are trying to figure out and you have
your formula)